Apparently before air brakes dudes would run around on top of the moving train (even in rain/snow) manually cranking the brake on each car whenever the train ne

Apparently before air brakes dudes would run around on top of the moving train (even in rain/snow) manually cranking the brake on each car whenever the train needed to stop. https://en.wikipedia.org/wiki/Brakeman https://en.wikipedia.org/wiki/Brakeman